INES Levels
INES N/A
INES 0
INES 1
INES 2
INES 3
INES 4
INES 5
INES 6
INES 7

INES 1: Anomaly

Impact on Defence-in-Depth
  • Overexposure of a member of the public in excess of statutory ­annual limits.
  • Minor problems with safety components with significant defence-in-depth remaining.
  • Low activity lost or stolen radioactive source, device or transport package.
(Arrangements for reporting minor events to the public differ from country to country. Also, it is difficult to ensure precise consistency in rating events between INES Level-1 and Below scale/Level-0)
Legenda & explanation
date title location 
1992-10-15LEAKAGE OF REACTOR CIRCUIT PIPE 76 MM DIAMETER FROM REACTOR CHANNEL 32-24 TO THE DRUM SEPARATORLithuaniaIGNALINA-2
1992-11-01INDICATIONS IN AUSTENITIC PIPING DISCOVERED DURING NON-DESTRUCTIVE TESTINGGermanyBRUNSBUETTEL
1992-11-12UNIT OPERATION WITH ONE REACTOR PROTECTION SYSTEM CHANNEL OUTUkraineSOUTH UKRAINE-2
1992-12-08INCORRECT CONNECTION OF CABLES TO RELAYS IN SAFETY SYSTEMSSwedenRINGHALS-2
1992-12-13REACTOR SHUTDOWN BY THE ACTUATION OF THE EMERGENCY PROTECTION SYSTEM FOLLOWED BY NON-COMPLIANCE WITH THE SAFE OPERATING LIMITS ON STEAM GENERATOR COOLDOWN RATEUkraineROVNO-2
1992-12-23LEVEL DECREASE IN ECCS TANK 20TJ20B001,2HungaryPAKS-2
1993-01-02SMALL STEAM LEAK FROM THE MAIN FLANGE OF THE PRIMARY COOLANT PUMP NO. 4BulgariaKOZLODUY-2
1993-02-02UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADORussian FederationKOLA-3
1993-02-02UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADORussian FederationKOLA-4
1993-02-12PLUTONIUM RECOVERY PLANT, B204United KingdomBNFL, Sellafield
1993-02-23FALL DOWN OF CONNECTOR FRAGMENTS INTO THE REACTOR VESSELSlovakiaBOHUNICE-2
1993-02-24CRACKS IN PIPEBENDS (ELBOWS) IN THE RESIDUAL HEAT REMOVAL SYSTEMSwedenOSKARSHAMN-1
1993-02-27WATER INGRESS IN ION CHAMBER HOUSING OF CHANNEL B & E OF REACTOR REGULATING AND PROTECTIVE SYSTEMIndiaNARORA-2
1993-03-05UNITS DERATED TO 60% REACTOR POWER DUE TO SAFETY ANALYSIS CONCERNSCanadaBRUCE-1
1993-03-05COOLANT RADIOACTIVITY EXCEEDING OPERATING LIMITS DUE TO FUEL ROD FAILUREBrazilANGRA-1
1993-03-14PVNGS 2 STEAM GENERATOR TUBE RUPTUREUnited States of AmericaPALO VERDE-2
1993-04-22INTERVENTION OF AUTOMATIC POWER CONTROL (APC) DUE TO SPURIOUS SIGNALSlovakiaBOHUNICE-2
1993-05-03UNCONTROLLED INCREASE OF REACTOR POWERHungaryPAKS-4
1993-05-27UNIT SCRAM DUE TO INADVERTENT ACTUATION OF PRESSURIZER PILOT RELIEF VALVERussian FederationKOLA-3
1993-06-03DIESEL GENERATOR START FAILURESlovakiaBOHUNICE-3
1993-09-15DETERIORATION OF NATURAL CIRCULATIONHungaryPAKS-2
1993-10-07RADIOACTIVE CONTAMINATION OF THE UNIT ROOMS DUE TO REACTOR COOLANT LEAK IN THE AUXILIARY SYSTEMRussian FederationBELOYARSKY-3(BN-600)
1993-10-12IMPENETRABILITY TEST OF CONTAINMENT NOT APPROVEDSwedenBARSEBECK-2
1993-10-18VIOLATION OF CHEMICAL REGIME OF STEAM GENERATOR FEED WATER (SGFW)SlovakiaBOHUNICE-3
1993-11-26HUMAN ERROR INITIATED SAFETY INJECTION/REACTOR TRIPSloveniaKRSKO
1993-12-09EXCEEDING OF CL-CONCENTRATION IN PRIMARY CIRCUIT WATERSlovakiaBOHUNICE-2
1993-12-21TURBINE TRIP DUE TO PRESSURE DROP IN STEAM GENERATOR MAIN COLLECTORSlovakiaBOHUNICE-2
1994-01-03RENDERING AN EMERGENCY FEEDWATER PUMP AND AN AUXILIARY EMERGENCY FEEDWATER PUMP AVAILABLE FOR A SHORT TIME WITHOUT ADHERANCE TO THE REQUIREMENTS OF THE TECSPECSHungaryPAKS-4
1994-01-18CRACK IN CONTROL ROD HOUSINGSpainJOSE CABRERA-1 (ZORITA)
1994-02-07FAILURE OF THE FOAM FIRE-EXTINGUISHING SPRINKLER SYSTEM TO OPERATE FOR 16 HOURS DUE TO FROZEN PIPESLithuaniaIGNALINA-1